Early tomorrow morning (Saturday, 6-18-11), four select varieties of either Boomi or PranaBar will be available as a lightning deal on Amazon.
I don’t know specifics of which bars or what the price will be. You can check the Amazon Gold Box page (please use my affiliate link) first thing in the morning and look for gourmet and grocery deals. The sale is four hours only and quantities are limited. Check early, the sale may start as early as 6:00 a.m. pacific time.